A Level Biology
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MESELSON and STAHL - Evidence of semi-conservation replication for A-level Biology. DNA REPLICATION
CO-TRANSPORT and ACTIVE TRANSPORT - sodium and glucose co-transport in the ileum fro A-level biology
A-Level Biology- Structure of the NEPHRON. Ultrafiltration and selective reabsorption in the kidney
DNA and CHROMOSOMES - A-level Biology DNA and CHROMOSOMES in eukaryotic and prokaryotic cells
How to study cells - Cell fractionation and ultracentrifugation for AQA A-level Biology
How to study cells - Microscopes, magnification and calibrating the eyepiece graticule
HIV structure and replication - A-level Biology. Learn how HIV replicates and leads to AID
A-level Biology TRANSLOCATION OF SUCROSE- mass flow hypothesis in plants and structure of the phloem
A-level Biology PHOTOSYNTHESIS REQUIRED PRACTICAL - AQA required practical 8 aim, method, conclusion
A-level EUKARYOTIC CELLS- The structure and function of the organelles found in eukaryotic cells
Transpiration and Cohesion-Tension Theory. Cohesion and adhesion in the transport of water in plants
PROTEIN STRUCTURE- Amino acid structures. Primary, secondary, tertiary and quaternary proteins
A-level Biology- Structure of HAEMOGLOBIN and Oxyhaemoglobin dissociation curves.
A-level Biology RESPIROMETER- AQA required practical. How to measure the rate of respiration
A-level- CARDIAC CYCLE. Diastole, atrial systole, ventricular systoles +the pressure +volume changes
AUTOSOMAL LINKAGE and DIHYBRID INHERITANCE- A-level Biology inheritance genetic crosses and ratios
OSMOREGULATION- A-level Biology. How the hypothalamus, posterior pituitary and ADH work together
A-level IMMUNITY and ANTIGENS. Cell recognition and lymphocytes to detect pathogens and self-cells
PHAGOCYTOSIS-A-level Biology. Phagocytes and macrophages engulf pathogens & lysozyme destroys them
CELL-MEDIATED response - A-level biology immunity cellular response of T cells (T Lymphocytes)
HUMORAL RESPONSE IMMUNITY-B cells, plasma cells & antibodies. Agglutination of antibodies & antigens
A-level Biology VACCINATIONS- Passive and Active Immunity. The importance of HERD IMMUNITY.
Hardy Weinberg equation- A-level Biology inheritance mathematical model to work out allele frequency
Inheritance Punnet Square Genetic Crosses- Overview of all inheritance for A-level Biology
PRODUCING DNA FRAGMENTS- Methods to produce DNA fragments for A-level recombinant DNA technology
MEIOSIS A-Level Biology - How CROSSING OVER and INDEPENDENT SEGREGATION introduce genetic variation
EPIGENETICS and GENE EXPRESSION A-level Biology. How methyl and acetyl groups control transcription
IN VIVO CLONING and RECOMBINANT DNA - A-level Biology. AQA topic 8 help is here!
SCREENING & SELECTING TRANSFORMED CELLS. Help with in vivo cloning for A-level Biology
GENETIC DIVERSITY & NATURAL SELECTION:A-LEVEL.Help understanding directional & stabilising selection
Establishing a RESTING POTENTIAL in a neurone- Do you know what the resting potential is?
ACTION POTENTIALS: Depolarization and repolarization on an axon, Includes All or nothing principle
Respiration: Step 1 GLYCOLYSIS. Phosphorylation of glucose, making TP and Pyruvate.
AEROBIC respiration: The LINK REACTION and the KREBS CYCLE for AQA A-level Biology.
OXIDATIVE PHOSPHORYLATION: A-level Biology Aerobic respiration. Chemiosmotic theory and ETC
TRIGLYCERIDE and PHOSPHOLIPID structure and function for A-level Biology. Includes EMULSION test.
STATISTICS HELP: The Correlation Coefficient, worked example of Spearman's Rank
STATISTICS help: Student T test. Worked examples,exam questions & critical analysis
STATISTICS help: How to analyse and interpret chi squared. What does a P value mean
Respiration A-level Required Practical: Effect of temperature on dehydrogenase in yeast using TTC
Using STANDARD DEVIATION to analyse data in A-level Biology. Help with evaluate the conclusion qs
NITROGEN CYCLE: A level biology AQA. Saprobionts, nitrogen-fixing, ammonification & nitrification
Aseptic Technique - REQUIRED PRACTICAL. Culturing microbes in a streak plate and inhibition zone.
THE PHOSPHORUS CYCLE for A Level Biology: The importance of mycorrhiza fungus too
BLOOD VESSELS: A level biology. Comparing the structure and function of each blood vessel.
Function and Formation of TISSUE FLUID: A level Biology. How it is formed and reabsorbed
Classification of species, taxonomy, phylogenetic classification and binomial system for A-Level Bio
GAS EXCHANGE IN FISH & COUNTERCURRENT exchange principle: A-level Biology. Gill filaments & lamella
GAS EXCHANGE in TERRESTRIAL INSECTS: tracheal system & how insects reduce water loss.A Level Biology
The Importance of COURTSHIP BEHAVIOUR: A-level. Why courtship is essential for species survival
BIODIVERSITY & calculating INDEX of DIVERSITY. Human impact and definitions for A-Level Biology
Human GAS EXCHANGE SYSTEM - A level Biology. Learn the structures, ventilation and gas exchange.
ANALYSING DATA on LUNG DISEASE: Risk Factors, spirometer trace and correlation. A-level Biology.
Surface area:Volume ratio calculation & the relevance in Biology.The importance in exchange surfaces
PLASMA MEMBRANE structure and function: Phospholipid bilayer for A-level Biology. Fluid-mosaic model
TRANSPORT ACROSS MEMBRANES: A-level Bio. Simple & facilitated diffusion, osmosis & active transport
TRANSPORT ACROSS MEMBRANES: A-level Bio. Simple & facilitated diffusion, osmosis & active transport
Potometer Experiment : Measuring the rate of transpiration. A-level Biology Experiment
Potometer Experiment : Measuring the rate of transpiration. A-level Biology Experiment
Digestion and Absorption for A-level Biology: Carbohydrates, proteins and lipids (micelles
DNA REPLICATION - Learn the SEMI-CONSERVATIVE REPLICATION DNA. Function of helicase. A-Level Biology
Type of GENE MUTATIONS: A-level Biology. Do you know the 6 types of gene mutations
Type of GENE MUTATIONS: A-level Biology. Do you know the 6 types of gene mutations?
STEM CELLS: Totipotent, pluripotent, multipotent and unipotent. Learn how iPS cells are made
CHROMOSOME mutations - A level biology. Nondisjunction in meiosis. Aneuploidy & polyploidy
CHROMOSOME mutations - A level biology. Nondisjunction in meiosis. Aneuploidy & polyploidy
POPULATIONS: Abiotic and Biotic factors A-level Biology. Competition and predator-prey relationships
CHLOROPHYLL:Adaptations of chlorophyll for absorption of light in LDR. Absorption spectrum explained
CHLOROPHYLL:Adaptations of chlorophyll for absorption of light in LDR. Absorption spectrum explained
CHLOROPHYLL:Adaptations of chlorophyll for absorption of light in LDR. Absorption spectrum explained
CHLOROPHYLL:Adaptations of chlorophyll for absorption of light in LDR. Absorption spectrum explained
CHLOROPHYLL:Adaptations of chlorophyll for absorption of light in LDR. Absorption spectrum explained
How to Sample in Ecology: Accurately represent the population size REQUIRED PRACTICAL 12.
Mark-Release-Recapture A-level Biology: Estimating population size of animals
CANCER A-level Biology: Benign and malignant tumours and how tumours develop.
Mark-Release-Recapture Skittles Practical- Join in! A-level Biology practical for school or home
Required Practical CHLOROPHYLL CHROMATOGRAPHY for A-level Biology. Do you know what an Rf value is?
Ecological Succession: A-level biology. Primary & secondary succession &each seral stage explained
Ecological Succession: A-level biology. Primary & secondary succession &each seral stage explained
PHOTOSYNTHESIS -Light Dependent Reaction:A-level Biology. Photolysis, photoionisation & chemiosmosis
Light Independent Reactions of Photosynthesis A-level (LIR The Calvin Cycle)
ATP A-level biology: Immediate source of energy. Structure and function.
WATER - A-level Biology. The importance of water - structure and function
How to get TOP MARKS in a biology essay: AQA A-level 25 mark essay on paper 3
DNA structure and function for A-level Biology. Nucleotide monomer and polynucleotide polymer
RNA Nucleic Acid Structure & Function:A-level. Do you know the differences between mRNA, tRNA &rRNA?
ENZYME ACTION: Lock and key compared to Induced Fit Model in lowering activation energy.
Factors Affecting Enzymes: Temperature, pH, substrate & Enzymes concentration and Inhibitors.
Features of the GENETIC CODE: A-level Biology. Degenerate, non-overlapping and universal.
PROTEIN SYNTHESIS: A-level Biology. Transcription, translation and pre-mRNA modifications
Cell Cycle & MITOSIS: A-level Biology. Prophase, Metaphase, Anaphase and Telophase
MONOCLONAL ANTIBODIES : The ELISA test. Medical treatment, diagnosis and ethics for A-level Biology
PCR In vitro cloning: A-level Biology. Polymerase chain reaction process and advantages
ANAEROBIC RESPIRATION:A-level Biology. Reaction, efficiency and why it is so important.
GENETIC FINGERPRINTING- A-level Biology. Gel electrophoresis, VNTRs and the uses.
TRANSCRIPTIONAL FACTORS: Gene regulation and the role of oestrogen explained.
Regulating Translation: RNA interference (RNAi) by small interfering RNA (siRNA). A-level Biology
SPECIATION & GENETIC DRIFT- Disruptive selection leads to speciation (allopatric & sympatric).
Chi squared in inheritance: Using chi-squared to prove Mendelian genetics.
ENERGY TRANSFER & PRODUCTIVITY: A-level Biology. NPP = GPP-R
PLANT GROWTH FACTORS: IAA and tropisms for A-level Biology. Phototropism and gravitropism.
Taxes and Kinesis: Simple responses in organisms to their environment. A-level Biology
Pacinian Corpuscle - Pressure receptor. A-Level Biology Nervous System and Response.
Synapses, Neuromuscular Junction and Summation. Cholinergic and inhibitory synapses.
Structure & function of skeletal MUSCLES: Myofibrils, sarcomere, sliding filament theory.
Control of BLOOD GLUCOSE: The role of insulin, glucagon and adrenaline. The second messenger model
Control of heart rate: Role of SAN & AVN in the cardiac cycle, Parasympathetic & sympathetic nerves
5 TOP TIPS on How to Get FULL MARKS on Long Answer & Extended Response Biology Questions.
CRITICAL ANALYSIS exam questions: how to improve your exam technique to achieve an A* in Biology
How to make maximum progress to achieve an A*: Effective test analysis
CHOICE CHAMBER Required Practical: A-level Biology practical with maggots or woodlice studying taxes
Exam Paper Strategy ¦ How to improve your time management & gain more marks on Biology AQA Paper 1
Fertilisers: Natural & Artificial.Environmental impact-leaching & eutrophication for A-level Biology
Using Genome Projects: What is a genome and how can a sequenced genome be useful?
Gas Exchange in Plants: The role of the stomata, spongy mesophyll and palisade mesophyll
Factors affecting the speed of an Action Potential: The Speed of Conductance Along an Axon.
Mammalian Circulatory System: Closed, double circulatory system. A-level Biology.
Biology Practical- A-level Required Practical. Invertebrates movement behaviour within a maze.
How to do BIOLOGICAL DRAWINGS for GCSE and A-level required practicals. How to get full marks.
Control of BLOOD GLUCOSE: The role of insulin, glucagon and adrenaline. The second messenger model
Genetic screening & Genetic counselling. A-level Biology. Use of DNA probes & DNA hybridisation.
INHERITANCE PEDIGREE DIAGRAMS- How to get FULL MARKS on exam questions - question run through
Mitosis root tip squash - Required practical A level Biology. Method explained & exam questions
How to study cells - Cell fractionation and ultracentrifugation for AQA A-level Biology
PROKARYOTIC CELL STRUCTURE AND ORGANELLES-A-level Biology cells topic 2.
EPISTASIS- A-level Biology Inheritance. Genetic crosses showing how one gene masks another
Biology Essay -AQA A level. How to get full marks & what to learn for beyond the specification.
EUKARYOTIC CELLS A level Biology - Structure & function of the organelles found in eukaryotic cells
A-level Biology RESPIROMETER- AQA required practical. How to measure the rate of respiration
Enzymes Required Practical - A level Biology. The effect of a variable on the rate of reaction
A Level biology using LOGARITHMS - How to calculate log and when to use it. Math Skills in Biology
A Level Biology ESSAY - Marking your essays. Top, middle and lower scoring essay marked for you.
A level Biological Molecules - Learn the ENTIRE topic in this video. AQA A level Biology Revision
A level Biology ENTIRE topic 6: Learn the whole topic - response, muscles, synapses & homeostasis
Calvin’s Apparatus - The Calvin Cycle (LIRs) in Photosynthesis Explained in Calvin’s Experiment
Lipid Digestion & Absorption | Key Marking Points | A-level Biology Modelled Exam Questions.
A-Level Biology: Mastering Photosynthesis - Learn the Entire Topic in One Video! LDR & LIR
AQA A-Level Biology: Respiration - Learn the Entire Topic in One Video! Aerobic & Anaerobic
Exams 2023 - AQA paper 1 (or ENTIRE AS LEVEL) - Learn all the theory for the exam
3 Essay Titles You Should Plan - AQA A-level Biology paper 3 | Biology essa
AQA Required Practicals- all the Biology practicals | how to revise the practicals | Key techniques
Biology Essay - Don't make these mistakes! How to get full marks | common essay mistakes
Final advice, tips and strategy for paper 3 | Timing | The essay
Blood Vessels | Structure & Function | Under the microscope | Artery & Veins
A Level biology Exam Information
A Level biology Exam Information
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